<< Last edit Jan 17, 2023 >>
Many people use a programmer called "TL866II +", and I use it too. Now with the newest model "T48", there are more ROMs supported and the price has dropped.
Correct. The data lines on the PLCC32 sockets on my logicboard are reversed because otherwise routing them in the tight available space would have been really messy.if you remove the PLCC chips from any ROM SIMM and put them into the replica’s PLCC sockets (which don‘t exist on the stock logic board), they will apparently not work (I didn‘t test this) without reprogramming.
@JDW In the case of T48, more chips are supported, so it can be used widely.Kay,
Do you have the T48?
I don't have either programmer yet because I almost never program anything other than Microchip PIC MCUs, and I have a ProMate 3 for that. Sadly, the ProMate3 programmer won't program the SST39SF040 chips.
On Amazon USA, the price of the T48 is $73.99 with various sockets including the PLCC32. On Amazon Japan, the lowest price with sockets seems to be ¥13,999, which is very expensive. (Exchange rate conversion on Amazon USA price: US$74 x ¥131 = ¥9694) Prices on AliExpress are cheaper, but quality is a concern.
Where do you find the "lower price" for the T48?
We prepared 3 colors.
Unfortunately there is no corresponding EEPROM, so it is limited to 512KB or 2MB. However, 2MB is enough unless there is something special.Hey @Kay K.M.Mods, can we do 8 MB?
Actually, I bought a kit for the TL866II+, but it comes with many necessary adapters, but I rarely use them. So I do not recommend them. By the way, if you buy only the adapter you use separately, it will be considerably cheaper.If you buy the 12pc programmer kit using Kay's AliExpress link, it includes the PLCC32 adapter (no need to buy that one adapter separately in that case)...
But what's the link to the MacOS software to control the programmer?
I don't think so.Maybe it's good to stay with the TLS866+, not only for the MacOS software, but also because it can program your ROM chips and just about anything else too, including the ROMs for a Mac SE and other programming projects like that?
SOURCE: https://groups.google.com/g/sebhc/c/Hn0xDdiyryc
Unfortunately there is no corresponding EEPROM, so it is limited to 512KB or 2MB. However, 2MB is enough unless there is something special.
Calculate them as follows:So, 2 MB = four 512KB EEPROM PLCC-32 chips. I can see that 2 MB EEPROM PLCC-32 chips are obtainable. I understand that some of them only can be programmed once rather than over again and again. There are 2 MB EEPROM PLCC-32 chips that can program more than once.
For example:
SST39SF020A-55-4C-NHE via Digi-Key is available to ship immediately, which are re-writeable EEPROM PLCC-32 chips 2 MB each.
8 MB is better to boot up the SE/30 in the desired System with desired INITS and other add-ons like utility apps to check the hard drive or SD, diagnostics, etc.
Hmm, the more I think about it, it is measured in kilobits and megabits rather than kilobytes and megabytes. Does that mean the 512Kbit x 8 = 2 MB? So, 4Mbit x 8 = 8 MB? I can see some EEPROM PLCC-32 chips organized in 4 Mbit x 8.
Understood. Thank you, @Kay K.M.Mods.
I noticed that it is possible to have a minimum System file, such as the System file on FWB Toolkit's Emergency Boot Disk. So, perhaps a few essential utilities. After all, 2 MB means about 500 KB more than a 1.44 MB disk.